<template>
  <div class="login" :style="'background-image:url('+ Background +');'">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" label-position="left" label-width="0px" class="login-form">
      <h3 class="title">
        数据共享交换平台
      </h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" type="text" auto-complete="off" placeholder="账号">
          <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input v-model="loginForm.password" type="password" auto-complete="off" placeholder="密码" @keyup.enter.native="handleLogin">
          <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="code" class="yzm-box">
        <el-input v-model="loginForm.code" auto-complete="off" placeholder="验证码" style="width: 68%" @keyup.enter.native="handleLogin" />
        <div class="login-code">
          <el-button type="primary" :disabled="countdown > 0" plain class="yzm-btn" @click="dxBtn()">
            {{ countdown > 0 ? `${countdown}s后重新获取` : '获取验证码' }}
          </el-button>
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin:0 0 25px 0;">
        记住我
      </el-checkbox>
      <el-form-item style="width:100%;">
        <el-button :loading="loading" size="medium" type="primary" style="width:100%;" @click.native.prevent="handleLogin">
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
      </el-form-item>
    </el-form>
    <div v-if="$store.state.settings.showFooter" id="el-login-footer">
      <span v-html="$store.state.settings.footerTxt" />
      <span v-if="$store.state.settings.caseNumber"> ⋅ </span>
      <a href="https://beian.miit.gov.cn/#/Integrated/index" target="_blank">{{ $store.state.settings.caseNumber }}</a>
    </div>
  </div>
</template>

<script>
import { encrypt } from '@/utils/rsaEncrypt'
import Config from '@/settings'
import { getCodeImg, getMessage } from '@/api/login'
import Cookies from 'js-cookie'
import qs from 'qs'
import Background from '@/assets/images/background.jpg'
export default {
  name: 'Login',
  data() {
    return {
      countdown: 0, // 倒计时初始值为0，表示未开始倒计时
      Background: Background,
      codeUrl: '',
      cookiePass: '',
      loginForm: {
        username: '',
        password: '',
        rememberMe: false,
        code: '',
        uuid: ''
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', message: '用户名不能为空' }],
        password: [{ required: true, trigger: 'blur', message: '密码不能为空' }],
        code: [{ required: true, trigger: 'change', message: '验证码不能为空' }]
      },
      loading: false, // 仅登录按钮使用的loading状态，与获取验证码无关
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        const data = route.query
        if (data && data.redirect) {
          this.redirect = data.redirect
          delete data.redirect
          if (JSON.stringify(data) !== '{}') {
            this.redirect = this.redirect + '&' + qs.stringify(data, { indices: false })
          }
        }
      },
      immediate: true
    }
  },
  created() {
    this.getCookie() // 获取用户名密码Cookie
    this.point() // token过期提示
  },
  methods: {
    startCountdown() {
      this.countdown = 60 // 设置倒计时时间为60秒
      const interval = setInterval(() => {
        if (this.countdown > 0) {
          this.countdown--
        } else {
          clearInterval(interval) // 倒计时结束，清除定时器
        }
      }, 1000)
    },
    getCode() {
      getCodeImg().then(res => {
        this.codeUrl = res.img
        this.loginForm.uuid = res.uuid
      })
    },
    getCookie() {
      const username = Cookies.get('username')
      let password = Cookies.get('password')
      const rememberMe = Cookies.get('rememberMe')
      this.cookiePass = password === undefined ? '' : password
      password = password === undefined ? this.loginForm.password : password
      this.loginForm = {
        username: username === undefined ? this.loginForm.username : username,
        password: password,
        rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
        code: ''
      }
    },
    dxBtn() {
      // 表单基础校验（仅校验用户名和密码，不触发全局loading）
      if (!this.loginForm.username) {
        this.$message.error('请输入用户名')
        return
      }
      if (!this.loginForm.password) {
        this.$message.error('请输入密码')
        return
      }

      // 开始倒计时（禁用按钮，替代全局loading的交互反馈）
      this.startCountdown()
      // 请求验证码接口（移除任何可能的全局loading触发逻辑）
      getMessage({ userName: this.loginForm.username, textMessageType: 0 })
        .then(res => {
          this.loginForm.uuid = res.uuid
          this.$message.success('验证码已发送，请注意查收') // 增加友好提示
        })
        .catch(err => {
          // 错误时重置倒计时，允许用户重新获取
          this.countdown = 0
          this.$message({
            showClose: true,
            message: err.response?.data?.message || '获取验证码失败，请稍后重试',
            type: 'error'
          })
        })
    },
    handleLogin() {
      if (this.loading) return // 登录中，忽略回车事件
      this.$refs.loginForm.validate(valid => {
        const user = {
          username: this.loginForm.username,
          password: this.loginForm.password,
          rememberMe: this.loginForm.rememberMe,
          code: this.loginForm.code,
          uuid: this.loginForm.uuid
        }
        if (user.password !== this.cookiePass) {
          user.password = encrypt(user.password)
        }
        if (valid) {
          this.loading = true // 仅登录操作触发按钮自身loading
          if (user.rememberMe) {
            Cookies.set('username', user.username, { expires: Config.passCookieExpires })
            Cookies.set('password', user.password, { expires: Config.passCookieExpires })
            Cookies.set('rememberMe', user.rememberMe, { expires: Config.passCookieExpires })
          } else {
            Cookies.remove('username')
            Cookies.remove('password')
            Cookies.remove('rememberMe')
          }
          this.$store.dispatch('Login', user)
            .then(() => {
              this.loading = false
              this.$router.push({ path: '/' })
            })
            .catch(() => {
              this.loading = false
              // this.getCode()
            })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    point() {
      const point = Cookies.get('point') !== undefined
      if (point) {
        this.$notify({
          title: '提示',
          message: '当前登录状态已过期，请重新登录！',
          type: 'warning',
          duration: 5000
        })
        Cookies.remove('point')
      }
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-size: 100% 100%;
}
.title {
  margin: 0 auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 385px;
  padding: 25px 25px 5px 25px;
  .el-input {
    height: 38px;
    input {
      height: 38px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.yzm-box{
  .el-form-item__content{
    display: flex;
    justify-content: space-between;
  }
  .yzm-btn{
    height: 38px;
    width: 110px;
  }
}
.login-code {
  width: 110px;
  height: 38px;
  display: inline-block;
  text-align: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
#el-login-footer {
  position: absolute;
  bottom: 20px;
  color: #fff;
  font-size: 12px;
  text-align: center;
  a {
    color: #fff;
    text-decoration: underline;
  }
}
</style>
